A-BC-D paradigm to study and understand consumer
behavior. The acronym A-B-C-D stands for the four
stages of the paradigm namely access, buying behavior,
consumption characteristics and disposal.
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In parallelogram ABCD, AC=BD. Is ABCD a rectangle?
It is k times the perimeter of EFGH where k is the constant ratio of the sides of ABCD to the corresponding sides of EFGH.
It is k times the perimeter of abcd where k is the constant ratio of the sides of efgh to the corresponding sides of abcd.
It is k times the perimeter of efgh, where k is the constant of proportionality between the sides of abcd and the corresponding sides of efgh.
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